SSC MTS 7 Oct 2021 Shift 2 Paper

Two statements are given followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.
Statements:
No pen is a pencil.
All pencils are chalks.
Conclusions:
I. No chalk is a pen.
II. No pencil is a pen.
III. Some chalks are pencils.